Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6879448 | Apparatus for achromatizing optical beams | John A. Hoffnagle | 2005-04-12 |
| 6801368 | System for converting optical beams to collimated flat-top beams | Hans J. Coufal, John A. Hoffnagle | 2004-10-05 |
| 6654183 | System for converting optical beams to collimated flat-top beams | Hans J. Coufal, John A. Hoffnagle | 2003-11-25 |
| 6295168 | Refractive optical system that converts a laser beam to a collimated flat-top beam | John A. Hoffnagle | 2001-09-25 |
| 6281993 | Phase shifting element for optical information processing storing systems | Maria-Pilar Bernal, Hans J. Coufal, Robert K. Grygier, Egbert Oesterschoze, Kenneth Francis Walsh | 2001-08-28 |
| 5297076 | Spectral hole burning data storage system and method | Alfred Meixner | 1994-03-22 |
| 4841389 | Magnetic transducer crash anticipation and response method and apparatus | Roger F. Hoyt, Steven E. Millman | 1989-06-20 |